Book-sheet-perforating device.



A. LAWSON. BOOK SHEET PEEEOEATING DEVICE. APPLIGATION FILED JULY 10,1908.

918,871. Patented Apr. 20, 1909.

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(ALB RT LAWSON, or ST. 1IOUIS,MISSOURI BOOK-SHEE T- PERFORATING DE VICE Specification of Letters Patent.

Patented April 20, 1909; v

Application filed July 10, 1908. Serial at. 442,898.

To all whom it may concern:

Be it known that 1, ALBERT LAwsoN, a

citizen of the United States of America, re-' siding in the city of St. Louis and State of Missouri, have invented certain new and useful Improvements in Book-Sheet-Perforating Devices, of which thefollowing is a full, clear, and exact description,'reference being had to the accom aanying drawings, forming part of this speciiication. V

My invention relates to a device for use in perforating loose sheets of paper prepara tory to binding them to books and the inven tion has for itsobject to facilitate the binding of loose sheets by affording means whereby the sheets may be readily and accurately assembled and held while being drilled or otherwise perforated previous to being bound together into a book Figure I is a perspective view of my device with a plurality of sheets of paper in position to be perforated. Fig. II is an enlarged plan view of the device with parts broken out. Fig. 111 is an enlarged view of the forward portion of the device with the upper part in elevation and the lower parts in vertical section taken on line IH1H-, Fig. 11. Fig. IV is an enlarged vertical section taken on line IVIV, Fig. 11. 1

In the accompanying drawings: 1 designates the table of my device, the rear end of which is su ported by a foot piece 2 that serves to ho d this portion of the table elevated.

3 is a support beneath the forward portion of the table and which preferably consists of an angle shaped bar, one flange of which is vertically disposed and the other 'fiangeof which is horizontally ositioned beneath and attached to the tab e. The horizontal flange of this support is cut centrally of its ends, thereby permitting of the vertical flange being bent, as seen in dotted lines,

, Fig. II, in order that the central portion of may extend to any desired degree above the table 1.

5 are hand wheels having downwardly extending sleeves 6 which are screw-threaded internally to operate upon the screw-threaded posts 4. The sleeve of each hand wheel is provided with an annular groove 7.

8 designates a jig bar provided at intervals between its ends with perforations 9 in which a boring tool or punch may be operated. Near each end of the jig bar is a slot 10 that extends inwardly from one side of the bar and is of suflicient dimensions to receive the reduced portion of the adjacent hand wheel sleeve 6 at the location of the groove 7 therein and to provide for the rotation of the sleeve in the jig bar. I

11 are keys removably seated in the jig bar andextending across the slots therein to serve as keepers for the jig bar after it has been fitted to the hand Wheel sleeve.

12 is an inverted U-shaped guide carried by the jig bar and provided with perforations 13 in which the boring implement utilized for sheet perforating operation may operate while it is being operated through the perforations in the jig bar.

In the practical use of my device, the sheets of pa er to be perforated are held upon the tile of the device against the gage 14 located at one side of the table and so that the ends of the sheets which are to be perforated will occupy positions above openings 1? at the forward end of the table and beneath the jig bar, it being understood that atthis time the jig bar is in an elevated osition. After the desired number of sheets liave been placed upon the table, the hand wheels 5 are operated upon the posts 4 with the result of causing their sleeves to turn in the slots of the jig bar and lower said jig bar onto the sheets. The sheets therefore become clamped beneath the jig bar and any suitable implement, such as a boring bit, may be passed through the perforations in the guide 12 and the jig bar and then through the sheets to perforate them, the implement finally passing into the holes 1 in the table.

It will be seen that due to the construction and manner of attachment of the jig bar to the sleeves of the hand wheels by which it is operated, said bar may be readily detached from the hand Wheels and removed from the remainder of the device when there is any necessity for such action and also that either end of the jig bar may be detached without detaching the other, thereby permitting of the bar being swung laterally with the sleeve of the other hand Wheel serving as a pivotal member therefor.

I claim:

1. In a sheet perforating device, a table, screw-threaded posts extending above said table, hand Wheels fitted to said posts and rovided With sleeves, and a jig bar loosely tted to said sleeves and adapted to be raised and lowered thereby during the movement of the hand Wheels, substantially as set forth.

- 2. In a sheet perforating device, a table, screw-threaded posts extending above said table, hand Wheels fitted to said posts and provided with sleeves, a jig bar loosely "fitted to said sleeves and adapted to be raised and lowered thereby during the movement of the hand Wheels, and a perforated implement guide surmounting said jig bar, substantially as set forth.

'3. In a sheet perforating device, a table, screw-threaded posts extending above said table, hand Wheels fitted to said posts and having sleeves provided with annular grooves, and a jig bar fitted to said sleeves at the locations of their grooves, substantially as set forth.

4. In a sheet periorating device, a table,

screw-threaded posts extending above said table, hand Wheels littcd to said posts and pro *ided with sleeves having annular grooves, a jig bar provided. with slots adapted to receive said sleeves at the locations of their grooves, and means for holding said bar to said sleeves, substantially as set forth.

5. In a sheet perforating device, a table, a su iport for said table, screw threaded posts secured to said support and extending above the table, hand Wheels iittcd to said posts and provided with sleeves having annular grooves, a jig bar provided with slots adapted to be liited to said sleeves at the locations of the grooves therein, and keys seated in said jig bar and extending across their slots to hold the jig bar to said sleeve, substantially as set forth.

Al jBlEli'l LAWN )N In the presence of- H. G. Coon, BLANCHE HOGAN. 

